The uninsured rate among 18- to 64-year-olds dropped to 4.0% in 2016, falling 7.3 percentage points from 11.3% in 2013. This is half the national average of 8% uninsured, so Maryland is among the most covered states in the country.

The county with the biggest decrease in uninsured since 2013 is Somerset, dropping by 11 percentage points. The county had tied with Baltimore city in 2013 for the highest uninsured rate at 18%, and is now 7% in 2016.